Estimation Method of Leakage Flow on Screw Pump

Abstract

The purpose of this paper is to verify the volumetric efficiency of a screw pump for achieving high efficiency and pressure rising in the low pressure fuel supply system. High efficiency screw pumps require accurate estimation of leakage flow from the discharge to the suction through minute gaps. We constructed simple theoretical estimation and verified it experimentally with an actual screw pump on the market. We conclude that the estimation can be used for design of screw pumps.